Ruslan M. Medzhitov, Ph.D., professor of immunobiology, has received the AAI-BD Biosciences Investigator Award from the American Association of Immunologists (AAI) for his outstanding early-career contributions to the field of immunology. Medzhitov’s research has advanced our understanding of the immune system, particularly in regard to the family of toll -like receptors, which play an essential role in the innate immune response. The award, which has been co-sponsored by BD Biosciences since 1998, will be presented at the AAI’s annual meeting in Boston in May.